7VFX

The structure of Formyl Peptide Receptor 1 in complex with Gi and peptide agonist fMIFL


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
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Literature

Structural basis for recognition of N-formyl peptides as pathogen-associated molecular patterns.

Chen, G.Wang, X.Liao, Q.Ge, Y.Jiao, H.Chen, Q.Liu, Y.Lyu, W.Zhu, L.van Zundert, G.C.P.Robertson, M.J.Skiniotis, G.Du, Y.Hu, H.Ye, R.D.

(2022) Nat Commun 13: 5232-5232

  • DOI: https://doi.org/10.1038/s41467-022-32822-y
  • Primary Citation of Related Structures:  
    7EUO, 7VFX

  • PubMed Abstract: 

    The formyl peptide receptor 1 (FPR1) is primarily responsible for detection of short peptides bearing N-formylated methionine (fMet) that are characteristic of protein synthesis in bacteria and mitochondria. As a result, FPR1 is critical to phagocyte migration and activation in bacterial infection, tissue injury and inflammation. How FPR1 distinguishes between formyl peptides and non-formyl peptides remains elusive. Here we report cryo-EM structures of human FPR1-Gi protein complex bound to S. aureus-derived peptide fMet-Ile-Phe-Leu (fMIFL) and E. coli-derived peptide fMet-Leu-Phe (fMLF). Both structures of FPR1 adopt an active conformation and exhibit a binding pocket containing the R201 5.38 XXXR205 5.42 (RGIIR) motif for formyl group interaction and receptor activation. This motif works together with D106 3.33 for hydrogen bond formation with the N-formyl group and with fMet, a model supported by MD simulation and functional assays of mutant receptors with key residues for recognition substituted by alanine. The cryo-EM model of agonist-bound FPR1 provides a structural basis for recognition of bacteria-derived chemotactic peptides with potential applications in developing FPR1-targeting agents.


  • Organizational Affiliation

    Kobilka Institute of Innovative Drug Discovery, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong, 518172, China.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
fMet-Leu-Phe receptorA [auth R]378Homo sapiensMutation(s): 0 
Gene Names: FPR1
UniProt & NIH Common Fund Data Resources
Find proteins for P21462 (Homo sapiens)
Go to UniProtKB:  P21462
PHAROS:  P21462
GTEx:  ENSG00000171051 
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(i) subunit alpha-1B [auth A]354Homo sapiensMutation(s): 0 
Gene Names: GNAI1
UniProt & NIH Common Fund Data Resources
Find proteins for P63096 (Homo sapiens)
Go to UniProtKB:  P63096
PHAROS:  P63096
GTEx:  ENSG00000127955 
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1C [auth B]357Homo sapiensMutation(s): 0 
Gene Names: GNB1
UniProt & NIH Common Fund Data Resources
Find proteins for P62873 (Homo sapiens)
Go to UniProtKB:  P62873
PHAROS:  P62873
GTEx:  ENSG00000078369 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2D [auth G]71Homo sapiensMutation(s): 0 
Gene Names: GNG2
UniProt & NIH Common Fund Data Resources
Find proteins for P59768 (Homo sapiens)
Go to UniProtKB:  P59768
PHAROS:  P59768
GTEx:  ENSG00000186469 
Sequence Annotations
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  • Reference Sequence
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
scFv16E [auth S]269Mus musculusMutation(s): 0 
Sequence Annotations
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  • Reference Sequence

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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Peptide agonist fMIFLF [auth C]4Staphylococcus aureusMutation(s): 0 
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX
RECONSTRUCTIONRELION

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Other government--

Revision History  (Full details and data files)

  • Version 1.0: 2022-09-21
    Type: Initial release
  • Version 1.1: 2022-12-07
    Changes: Database references, Refinement description